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Title:
RUBBER COMPOSITION, TIRE, CONVEYOR BELT, RUBBER CRAWLER, VIBRATION ISOLATION DEVICE, SEISMIC ISOLATION DEVICE, AND HOSE
Document Type and Number:
WIPO Patent Application WO/2019/163835
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a rubber composition that strikes a high degree of balance among wear resistance, crack growth resistance, and workability. The rubber composition is characterized by comprising, as a rubber component (a): a multicomponent copolymer (a1) including a conjugated diene unit, a non-conjugated olefin unit, and an aromatic vinyl unit and having an endothermic peak energy of 10-150 J/g as measured using a differential scanning calorimeter (DSC) at 0-120°C; and a conjugated diene rubber (a2) other than the multicomponent copolymer (a1), wherein the contained amount of the multicomponent copolymer (a1) in the rubber component (a) is not less than 5 mass% but less than 50 mass%, the conjugated diene rubber (a2) forms a continuous phase, and the multicomponent copolymer (a1) forms a dispersed phase.

Inventors:
SAJI Shunsuke (1-1 Kyobashi 3-chom, Chuo-ku Tokyo 40, 〒1048340, JP)
INUTSUKA Shoko (1-1 Kyobashi 3-chom, Chuo-ku Tokyo 40, 〒1048340, JP)
NAKATANI Kenji (1-1 Kyobashi 3-chom, Chuo-ku Tokyo 40, 〒1048340, JP)
TANEMURA Shun (1-1 Kyobashi 3-chom, Chuo-ku Tokyo 40, 〒1048340, JP)
SHODA Yasuhiro (1-1 Kyobashi 3-chom, Chuo-ku Tokyo 40, 〒1048340, JP)
Application Number:
JP2019/006358
Publication Date:
August 29, 2019
Filing Date:
February 20, 2019
Export Citation:
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Assignee:
BRIDGESTONE CORPORATION (1-1 Kyobashi 3-chome, Chuo-ku Tokyo, 40, 〒1048340, JP)
International Classes:
C08L9/00; B60C1/00; B62D55/24; B65G15/32; C08L7/00; C09K3/00; F16F1/36; F16F15/08; F16L11/04
Domestic Patent References:
WO2017065299A12017-04-20
WO2018230410A12018-12-20
Foreign References:
JP2017075286A2017-04-20
JPH11228743A1999-08-24
JP2005220313A2005-08-18
Attorney, Agent or Firm:
SUGIMURA Kenji (36F Kasumigaseki Common Gate West, 3-2-1 Kasumigasek, Chiyoda-ku Tokyo 13, 〒1000013, JP)
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